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Three test tubes A, B and C contain distilled water, an acidic solution and a basic solution respectively. When red litmus solution is used for testing these solutions, the observed colour changes respectively will be :(a) A - no change; B - becomes dark red; C - becomes blue(b) A - becomes light red; B - becomes blue; C - becomes red(c) A - becomes red; B - no change; C - becomes blue(d) A - becomes light red; B - becomes dark red; C - becomes blue |
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Answer» Correct answer is (a) A - no change; B - becomes dark red; C - becomes blue In distilled water neighter red litmus nor blue litmus paper, changes their colours. In acidic medium - Red litmus paper becomes dark red. In basic medium - Red litmus paper - becomes blue. |
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